The odd one out in every situation, Karen never seems to smile (or in fact show any extreme emotion) and this makes her invisible to everyone else or just a target for their teasing. Another member of staff to get herself into embarrassing situations with amazing ease, one of Karen's more memorable moments was when she somehow got her hair stuck in the printer (but of course even that didn't faze her).
Karen was completely obsessed with Martin, however it was unrequited love until Series 2. However, by this point she tired of Martin.
At the end of Series 2 she falls out of a window, bringing about a drastic change in her